Motor with adjustable movement stroke and electric nursing product

Abstract

The embodiment of the utility model provides a motor with an adjustable motion stroke. The motor comprises a housing; the motor shaft is movably connected with the shell; and the first driving device is arranged in the shell, the first driving device is connected with the motor shaft so as to drive the motor shaft to move, and the first driving device is provided with at least three positioning positions, so that the motor shaft has at least two movement strokes in the first direction. The motor with the adjustable movement stroke and the electric nursing product provided by the embodiment of the utility model have a multi-stroke adjusting function and can adapt to different requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor with adjustable movement stroke and an electric care product. Background Art

[0002] In daily life, people can use electric care products such as electric toothbrushes and fascia guns to meet their personal cleaning care and massage care needs. These electric care products use internal motors to drive the motor shaft to perform high-frequency vibration or telescopic movement to replace manual movement to achieve high efficiency and labor-saving effects. However, for example, the motors of existing electric care products can only achieve one movement stroke and do not have a stroke adjustment function. This single-stroke movement mode leads to inconvenience in use. For example, when using an electric toothbrush, during the process of axial extension and retraction of the brush head, for the same stroke range, when the stroke is sufficient to clean a large range of teeth near the middle, the teeth on both sides may be stabbed due to the large stroke. When the stroke is sufficient to clean the teeth on both sides without stabbing the gums, the stroke is too small, resulting in a situation where the cleaning range is too small and the cleaning force is insufficient. Therefore, the existing electric care products and their motors cannot achieve the stroke adjustment function and it is difficult to provide complex functions such as different power outputs. It is urgent to provide a motor for electric care products that can achieve adjustable stroke to meet more functions and uses. Utility Model Content

[0003] Therefore, in order to overcome at least some of the defects and shortcomings in the prior art, the embodiments of the present invention provide a motor and an electric care product with adjustable motion stroke, which can achieve multi-stroke adjustment and adapt to different usage requirements.

[0004] Specifically, an embodiment of the utility model provides a motor with adjustable motion stroke, comprising: a shell; a motor shaft movably connected to the shell; a first drive device arranged in the shell, the first drive device being connected to the motor shaft to drive the motor shaft to move, the first drive device having at least three positioning positions, so that the motor shaft has at least two motion strokes along a first direction.

[0005] In one embodiment, the first driving device includes: a first driving component, which is arranged on the motor shaft; a second driving component, which cooperates with the first driving component, and there are at least three positioning positions between the second driving component and the first driving component.

[0006] In one embodiment, the first driving assembly includes a first magnet assembly, and the second driving assembly includes a second magnet assembly, and the second magnet assembly is magnetically coupled to the first magnet assembly.

[0007] In one embodiment, one of the first magnet assembly and the second magnet assembly is a permanent magnet assembly, and the other is an electromagnet assembly.

[0008] In one embodiment, the permanent magnet assembly includes at least three first permanent magnets, and the at least three first permanent magnets are arranged along the first direction. The at least three first permanent magnets are respectively magnetically attracted to the electromagnet assembly to form the at least three positioning positions.

[0009] In one embodiment, the magnetic poles of two adjacent first permanent magnets facing the same surface of the electromagnet assembly are opposite; or, the magnetic poles of the end surface between two adjacent first permanent magnets are opposite.

[0010] In one embodiment, the second magnet assembly includes at least three first electromagnets, which are arranged along the first direction, each first electromagnet includes a first iron core and a first coil wound around the first iron core, and the first coils of the at least three first electromagnets are respectively magnetically positioned by the first magnet assembly, thereby forming the at least three positioning positions.

[0011] In one embodiment, the motor shaft includes a first section and a second section, the first section is located in the housing, the first drive assembly is arranged on the first section, the second section extends from the housing at one end away from the first section, and the second section and the first section are assembled and connected or integrally connected.

[0012] In one embodiment, the first direction is the axial direction or the circumferential direction of the motor shaft.

[0013] In one embodiment, the motor also includes a second driving device, which is connected to the motor shaft and is used to drive the motor shaft to move in a second direction, one of the second direction and the first direction is the axial direction of the motor shaft, and the other is the circumferential direction of the motor shaft.

[0014] An embodiment of the utility model further provides an electric care product, comprising a housing, a working part and a motor as described in any one of the above, wherein the motor is arranged in the housing, and the motor shaft is connected to the working part.

[0015] In one embodiment, it is any one of an electric toothbrush, a fascia gun, a facial cleanser, a beauty instrument and an adult product.

[0016] In one embodiment, the electric care product further includes: a controller electrically connected to the electromagnet assembly; an operation button electrically connected to the controller; and / or a wireless transceiver assembly electrically connected to the controller.

[0017] It can be seen from the above that the above embodiments of the utility model can achieve one or more of the following beneficial effects: by designing at least three positioning positions for the first drive device, the motor shaft has at least two movement strokes along the first direction, so that when the motor with adjustable movement stroke provided by the embodiment of the utility model is applied to an electric care product, different strokes of the working part of the electric care product can be achieved, thereby outputting different forces to the user to adapt to the user's needs under different usage conditions and achieve better care effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific implementation of the present utility model will be described in detail below with reference to the accompanying drawings.

[0019] Figure 1a A schematic diagram of the overall structure of a motor with adjustable motion stroke provided in one embodiment of the utility model.

[0020] Figure 1b A schematic diagram of the exploded structure of a motor with adjustable motion stroke provided in one embodiment of the utility model.

[0021] Figure 2a A partial cross-sectional schematic diagram of the area where the first drive device is located in a motor with adjustable motion stroke provided in one embodiment of the utility model.

[0022] Figure 2b for Figure 2a The diagram shows the states of the first drive device in the motor with adjustable movement stroke at three positioning positions respectively.

[0023] Figure 3 for Figure 2a The schematic partial cross-sectional view in another direction of the area where the first drive device of the motor with adjustable movement stroke is located is shown.

[0024] Figure 4 for Figure 2a The schematic diagram shows the principle of the motor shaft moving along the first direction in a motor with adjustable movement stroke.

[0025] Figure 5 for Figure 2a Another schematic diagram of the principle of the motor shaft moving along the first direction in the electric mechanism with adjustable movement stroke is shown.

[0026] Figure 6 for Figure 2a Another schematic diagram of the principle of the motor shaft moving along the first direction in the motor with adjustable movement stroke is shown.

[0027] Figure 7 for Figure 2aAnother schematic diagram of the principle of the motor shaft moving along the first direction in the motor with adjustable movement stroke is shown.

[0028] Figure 8 for Figure 2a Another schematic diagram of the principle of the motor shaft moving along the first direction in the motor with adjustable movement stroke is shown.

[0029] Figure 9a A partial cross-sectional schematic diagram of the area where the first drive device is located in a motor with adjustable motion stroke provided in another embodiment of the utility model.

[0030] Figure 9b for Figure 9a The diagram shows the first drive device in the motor with adjustable movement stroke in three positioning positions.

[0031] Fig.10 for Figure 9a The schematic cross-sectional view in another direction of the first drive device in the motor with adjustable movement stroke is shown.

[0032] Fig.11 for Figure 9a The schematic diagram shows the principle of the motor shaft moving along the first direction in a motor with adjustable movement stroke.

[0033] Fig.12 for Figure 9a Another schematic diagram of the principle of the motor shaft moving along the first direction in the motor with adjustable movement stroke is shown.

[0034] Fig.13a The figure is a schematic diagram of the exploded structure of a motor with adjustable motion stroke in one embodiment of the utility model.

[0035] Fig.13b This is another schematic diagram of the exploded structure of a motor with adjustable motion stroke in another embodiment of the utility model.

[0036] Fig.14 A cross-sectional schematic diagram of a second driving device in a motor structure provided by an embodiment of the present invention.

[0037] Fig.15 A cross-sectional schematic diagram of a second driving device in a motor structure provided in another embodiment of the utility model.

[0038] Fig.16a The utility model provides an overall structural diagram of an electric care product when it is an electric toothbrush.

[0039] Fig.16b for Fig.16a The electric care product shown is a cross-sectional schematic diagram corresponding to three positioning positions.

[0040] Fig.17a This is a schematic diagram of the overall structure of another electric care product provided by the utility model.

[0041] Fig.17b for Fig.17a The electric care product shown is a cross-sectional schematic diagram corresponding to three positioning positions.

[0042] Fig.18a This is a schematic diagram of the overall structure of another electric care product provided by the utility model.

[0043] Fig.18b for Fig.18a The provided electric care product is a cross-sectional schematic diagram corresponding to three positioning positions respectively.

[0044] Fig.19 A schematic diagram of the structure of an electric care product provided in an embodiment of the utility model.

[0045] Fig. 20 A schematic structural diagram of another electric care product provided in an embodiment of the utility model.

[0046] [Description of Reference Numerals]

[0047] 1000, electric care product; 100, motor; 10, housing; 20, motor shaft; 201, first section; 202, second section; 30, first drive device; 31, first drive assembly; 311, first magnet assembly; 3111, first permanent magnet; 32, second drive assembly; 321, second magnet assembly; 3211, first electromagnet; 32111, first iron core; 32112, first coil; 40, second drive device; 41, third drive assembly; 42, fourth drive assembly; 421, second iron core; 422, second coil; 50, controller; 60, operation button; 70, wireless transceiver assembly; 80, housing; 90, working part. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0049] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solution in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] It should also be noted that the division of multiple embodiments in the present invention is only for the convenience of description and should not constitute a special limitation. The features in various embodiments can be combined and referenced to each other without contradiction.

[0052] Reference Figure 1a The present utility model embodiment provides a motor 100 with adjustable motion stroke, including a housing 10, a motor shaft 20 and a first drive device 30 (refer to Figure 1b ). The motor shaft 20 is movably connected to the housing 10. For example, one end of the motor shaft 20 extends out of the housing 10. The first driving device 30 is disposed in the housing 10, and the first driving device 30 is connected to the motor shaft 20 to drive the motor shaft 20 to move. The first driving device 30 has at least three positioning positions, so that the motor shaft 20 has at least two strokes along the first direction.

[0053] The first direction is the direction in which the motion stroke is designed to be adjusted. For example, if the motor shaft 20 is extended and retracted relative to the housing 10 along the axial direction of the motor shaft 20, the adjustable motion stroke means that the length of the extension and retraction of the motor shaft 20 can be adjusted, and the first direction is the axial direction of the motor shaft 20. For example, if the motor shaft 20 is swung relative to the housing 10 along the circumferential direction of the motor shaft 20, the adjustable motion stroke means that the swing angle of the motor shaft 20 can be adjusted, and the first direction is the circumferential direction of the motor shaft 20.

[0054] For example, the first drive device 30 has at least three positioning positions, namely, an initial position, a first stroke position and a second stroke position. For example, the first drive device 30 switches from the initial position to the first stroke position, and in this process, the motor shaft 20 is driven to move a first distance in the first direction. At this time, if the first drive device 30 continues to switch from the first stroke position to the second stroke position, the motor shaft 20 continues to be driven to move a second distance in the first direction. In this process, the movement stroke of the motor shaft 20 is the sum of the first distance and the second distance. If the motor shaft 20 is stopped after the first drive device 30 is in the first stroke position, the movement stroke of the motor shaft 20 is the first distance. If the motor shaft 20 is required to have more movement strokes, the number of positioning positions of the first drive device 30 can be increased. Therefore, in this embodiment, the motor shaft 20 has at least two movement strokes through the design of multiple positioning positions of the above-mentioned first drive device 30, and different modes can be provided to users when applied in electric care products, thereby outputting different forces to users, adapting to the needs of users under different use conditions, and achieving better care effects.

[0055] Reference Figure 1b In some embodiments, the first drive device 30 includes a first drive assembly 31 and a second drive assembly 32. The first drive assembly 31 is disposed on the motor shaft 20. The second drive assembly 32 cooperates with the first drive assembly 31, and there are at least three positioning positions between the second drive assembly 32 and the first drive assembly 31.

[0056] For example, the motor shaft 20 includes a first section 201 and a second section 202, the first section 201 is located in the housing 10, the first drive assembly 31 is disposed on the first section 201, the second section 202 extends out of the housing 10 at one end away from the first section 201, and the second section 202 can be assembled and connected with the first section 201 through a structure such as a snap ring. Alternatively, the second section 202 and the first section 201 are integrally connected, for example, the second section 202 and the first section 201 are formed into a whole through an integral molding process, which can reduce the number of parts and reduce manufacturing costs.

[0057] The first drive assembly 31 may be, for example, a cam structure, on which a slide groove is provided, for example, and the second drive assembly 32 may be provided with a sliding member that can slide along the slide groove, and the slide groove may extend along the axial spiral of the motor shaft 20, so that the motor shaft 20 moves along the first direction (the axial direction of the motor shaft 20 in this case) during the sliding of the sliding member along the slide groove. The length of the slide groove (or the number of turns of the spiral) may be set so that there are at least three positioning positions between the second drive assembly 32 and the first drive assembly 31. Alternatively, the first drive assembly 31 and the second drive assembly 32 may be a threaded matching structure, and the number of turns of the thread may also be set so that there are at least three positioning positions between the second drive assembly 32 and the first drive assembly 31.

[0058] In some embodiments, the first drive assembly 31 includes a first magnet assembly 311, and the second drive assembly 32 includes a second magnet assembly 321, and the second magnet assembly 321 is magnetically coupled with the first magnet assembly 311. The first magnet assembly 311 and the second magnet assembly 321 can both be electromagnet assemblies. Alternatively, refer to Figure 2a or Figure 9a One of the first magnet assembly 311 and the second magnet assembly 321 is a permanent magnet assembly, and the other is an electromagnet assembly. By energizing or de-energizing the electromagnet assembly, or changing the direction of the magnetic field generated by the electromagnet assembly, the magnetic attraction force of the first magnet assembly 311 and the second magnet assembly 321 can be changed to achieve positioning and position switching, thereby achieving at least three positioning positions.

[0059] In a specific embodiment, the permanent magnet assembly includes at least three first permanent magnets 3111. The at least three first permanent magnets 3111 are arranged along the first direction, and the at least three first permanent magnets 3111 are magnetically attracted to the electromagnet assembly to form at least three positioning positions. The electromagnet assembly can be provided with only one first electromagnet 3211 or can include multiple first electromagnets 3211 arranged in sequence along the first direction. For example, referring to Figure 8 , take the example that the permanent magnet assembly includes three first permanent magnets 3111 and the electromagnet assembly includes a first electromagnet 3211. When each first permanent magnet 3111 is located below the first electromagnet 3211, it is a positioning position. For example, when the magnetic field generated by the electromagnet assembly causes the permanent magnet assembly to switch from the rightmost first permanent magnet 3111 being located below the first electromagnet 3211 to the middle first permanent magnet 3111 being located below the first electromagnet 3211, the permanent magnet assembly moves a first distance relative to the electromagnet assembly. When the magnetic field generated by the electromagnet assembly causes the permanent magnet assembly to continue to switch from the middle first permanent magnet 3111 being located below the first electromagnet 3211 to the leftmost first permanent magnet 3111 being located below the first electromagnet 3211, the permanent magnet assembly moves a first distance relative to the electromagnet assembly again. Thus, the movement stroke of the motor shaft 20 is two first distances. Or when the magnetic field generated by the electromagnet assembly causes the permanent magnet assembly to stop moving after the middle first permanent magnet 3111 is located below the first electromagnet 3211, the running stroke of the motor shaft 20 is a first distance. Therefore, by changing the magnetic field generated by the electromagnet assembly to move the permanent magnet assembly in different directions, the motor shaft 20 can be switched to different movement strokes.

[0060] Specifically, the magnetic poles of the same surface of two adjacent first permanent magnets 3111 facing the electromagnet assembly are opposite. For example, a single first permanent magnet 3111 has two magnetic poles facing each other in a second direction perpendicular to the first direction (for example, the first direction is the axial direction of the motor shaft 20, and the second direction is the radial direction of the motor shaft 20), for example, the surface of a first permanent magnet 3111 facing the electromagnet assembly is an N pole, and the surface facing away from the electromagnet assembly is an S pole, then the surface of another adjacent first permanent magnet 3111 facing the electromagnet assembly is an S pole, and the surface facing away from the electromagnet assembly is an N pole.

[0061] Alternatively, in some embodiments, the magnetic poles of the end faces between two adjacent first permanent magnets 3111 are opposite. For example, a single first permanent magnet 3111 includes two magnetic poles that are opposite to each other along the first direction. For example, a single first permanent magnet 3111 can be a magnetic strip with an N pole and an S pole arranged along the first direction. For example, referring to Figure 7 , the left end face of a first permanent magnet 3111 is an N pole, and the right end face is an S pole, then the right end face of another first permanent magnet 3111 adjacent to its left end face is an S pole, and the left end face is an N pole; the left end face of another first permanent magnet 3111 adjacent to its right end face is an N pole, and the right end face is an S pole. Through the above arrangement of the magnetic poles of the plurality of first permanent magnets 3111 in the permanent magnet assembly, the electromagnet assembly generates a repulsive force on a first permanent magnet 3111 in the permanent magnet assembly due to the same polarity, and also generates an attractive force on another adjacent first permanent magnet 3111, so that the electromagnet assembly simultaneously applies thrust and suction to the permanent magnet assembly, making the movement smoother.

[0062] In some embodiments, the second magnet assembly 321 includes at least three first electromagnets 3211, and the at least three first electromagnets 3211 are arranged in a first direction. Each first electromagnet 3211 includes a first iron core 32111 and a first coil 32112 wound on the first iron core 32111. The first coils 32112 of the at least three first electromagnets 3211 are respectively magnetically attracted to the first magnet assembly 311 to position, thereby reaching at least three positioning positions. At this time, the first magnet assembly 311 can be a permanent magnet assembly or an electromagnet assembly. The first magnet assembly 311 can be provided with only one first permanent magnet 3111 or can include multiple first permanent magnets 3111 arranged in sequence along the first direction; the first magnet assembly 311 can be provided with only one electromagnet or can include multiple electromagnets arranged in sequence along the first direction. Refer to Figure 2a and Figure 3 , the axial direction of the first coil 32112 is perpendicular to the first direction. Figure 9a and Fig.10The axial direction of the first coil 32112 is the same as the first direction. The axial direction of the first coil 32112 is also the direction in which the N pole and the S pole in the magnetic field generated by the first electromagnet 3211 are opposite to each other when the first coil 32112 is energized.

[0063] For example, refer to Figure 4 The second magnet assembly 321 includes three first electromagnets 3211, the first magnet assembly 311 includes two first permanent magnets 3111, and when the permanent magnet assembly is located below one first electromagnet 3211, it is a positioning position, so Figure 4 Three positioning positions are formed in the middle. In the initial position, the permanent magnet assembly is located below the first electromagnet 3211 on the left, and the first stroke position is reached when the magnetic field generated by the first electromagnet 3211 on the left makes the permanent magnet assembly move the first distance to the right to reach the first stroke position below the middle first electromagnet 3211. When the first electromagnet 3211 in the middle generates a magnetic field so that the permanent magnet assembly continues to move the first distance to the right to reach the second stroke position below the first electromagnet 3211 on the right, the permanent magnet assembly has moved two first distances relative to the initial stroke position. If the electromagnet assembly is stopped from being energized when reaching the bottom of the first electromagnet 3211 in the middle, the magnetic field is no longer generated, and the permanent magnet assembly remains in the first stroke position, and the permanent magnet assembly only moves a first distance relative to the initial stroke position. That is, one motion stroke of the motor shaft 20 is a first distance, and the other motion stroke is two first distances, so the motor shaft 20 has the function of adjustable stroke.

[0064] In the following embodiments, the first direction is mainly taken as the axial direction of the motor shaft 20 for illustration.

[0065] exist Figure 2a and Figure 9a The first magnet assembly 311 is a permanent magnet assembly, and the second magnet assembly 321 is an electromagnet assembly. When the first electromagnet 3211 in the electromagnet assembly is energized to generate a magnetic field, the permanent magnet assembly moves relative to the electromagnet assembly and drives the motor shaft 20 to move according to the principle that like poles repel each other and opposite poles attract each other. When the direction of the magnetic field of the first electromagnet 3211 is switched, the movement direction of the permanent magnet assembly changes, so that the motor shaft 20 can be reciprocated. In some embodiments, the electromagnet assembly can also be fixedly connected to the motor shaft 20, and the permanent magnet assembly can be fixedly connected to the housing 10.

[0066] The principle of the motor 100 provided in the embodiment of the utility model to achieve adjustable stroke can be referred to Figures 4 to 8 or Figure 11 to Figure 12 The length of the motor shaft 20 extending out of the housing 10 at at least three positioning positions of the first driving device 30 in the motor 100 and the positional relationship between the first magnet assembly 311 and the second magnet assembly 321 in the first driving device 30 can be referred to Figure 2b and Figure 9b shown.

[0067] Reference Figure 4 In the initial position, the two first permanent magnets 3111 are located below the first electromagnet 3211 on the left. When the first electromagnet 3211 is energized, the following is generated: Figure 4 In the direction of the magnetic field shown, the first electromagnet 3211 on the right is not energized and does not generate a magnetic field. The first electromagnet 3211 repels the first permanent magnet 3111 on the right and attracts the first permanent magnet 3111 on the left, causing the two first permanent magnets 3111 to move to the right. When the two first permanent magnets 3111 move to the bottom of the middle first electromagnet 3211, the power supply to the first electromagnet 3211 on the left is stopped, and the middle first electromagnet 3211 is energized in the same way, so that the two first permanent magnets 3111 continue to move to the right to the bottom of the rightmost first electromagnet 3211. The two first permanent magnets 3111 move to the right twice. If the two first permanent magnets 3111 move to the bottom of the middle first electromagnet 3211, the power supply to the first electromagnet 3211 on the left is stopped, and the middle first electromagnet 3211 is energized to generate the following: Figure 5 The magnetic field direction shown in the figure makes the two first permanent magnets 3111 move to the left, and the two first permanent magnets 3111 only move to the right once, and the stroke is short. Therefore, by increasing the number of first electromagnets 3211 in the electromagnet assembly, so that the number of first electromagnets 3211 is more than two, the maximum stroke of the permanent magnet assembly can be increased, and the actual stroke can be controlled by changing the direction generated by the first electromagnets 3211, so that different motion strokes can be selected and adjusted. Figure 9a The structure shown in the figure realizes the principle of stroke adjustment. Figure 2a The principle of achieving stroke adjustment in the structure shown is similar, except that the winding direction of the first coil 32112 in the first electromagnet 3211 is different. The direction of the generated magnetic field can be referred to Fig.11 shown.

[0068] Alternatively, when the number of the first permanent magnets 3111 is more than two, Figure 6 When the first permanent magnet 3111 on the far right is located below the first electromagnet 3211, the first electromagnet 3211 is energized to generate the following Figure 6In the direction of the magnetic field shown, the first electromagnet 3211 repels the first permanent magnet 3111 on the far right to generate thrust and attracts the first permanent magnet 3111 in the middle to generate suction, so that the permanent magnet assembly moves to the right. When the first permanent magnet 3111 in the middle moves to the bottom of the first electromagnet 3211, the current direction of the first electromagnet 3211 is switched to generate a magnetic field opposite to that before, so that the first permanent magnet 3111 in the middle is pushed, and the permanent magnet assembly continues to move to the right, then the permanent magnet assembly can move to the right twice, and the maximum stroke is the distance of the two movements. Therefore, setting the number of the first permanent magnets 3111 in the permanent magnet assembly to more than two can also increase the maximum achievable stroke, and different stroke controls can be achieved in conjunction with the control of the magnetic field direction of the electromagnet assembly.

[0069] Of course, the above description of the power-on sequence and magnetic field direction of the plurality of first electromagnets 3211 is for illustration only. Figure 7 or Fig.12 When the permanent magnet assembly moves to the right, the two adjacent first electromagnets 3211 can also be energized at the same time, but the magnetic fields generated by the two first electromagnets 3211 are in opposite directions. At this time, the first electromagnet 3211 on the left generates thrust on the permanent magnet assembly, while the first electromagnet 3211 on the right generates suction on the permanent magnet, making the movement smoother.

[0070] In this embodiment, the number of the first permanent magnet 3111 and the first electromagnet 3211 in the first driving device 30 is not limited. For example, the first driving device 30 may include two first permanent magnets 3111 and three first electromagnets 3211 arranged along the first direction. Alternatively, the first driving device 30 may include two first electromagnets 3211 and more than three first permanent magnets 3111 arranged along the first direction. Alternatively, Figure 2a Three first electromagnets 3211 and four first permanent magnets 3111 are arranged in the first direction. Or it can also be Figure 9a Nine first electromagnets 3211 and five first permanent magnets 3111 are arranged along the first direction.

[0071] In some embodiments, reference Fig.13a and Fig.13bThe motor 100 further includes a second driving device 40, which is connected to the second section 202 of the motor shaft 20, and is used to drive the motor shaft 20 to reciprocate along a second preset direction, wherein one of the second direction and the first direction is the axial direction of the motor shaft 20, and the other is the circumferential direction of the motor shaft 20. That is, when the first direction is the axial direction of the motor shaft 20, the second direction is the circumferential direction of the motor shaft 20. When the first direction is the circumferential direction of the motor shaft 20, the second direction is the axial direction of the motor shaft 20. The motor shaft 20 in the motor 100 can be driven into a synchronous motion state of telescopic and rotating (or swinging), realizing multi-directional motion and meeting the use requirements in different directions. The second drive device 40 includes, for example, a fourth drive assembly 42 fixed to the housing 10 and a third drive assembly 41 fixedly connected to the second section 202 of the motor shaft 20. The fourth drive assembly 42 includes, for example, an electromagnet mainly composed of a second iron core 421 and a second coil 422. The third drive assembly 41 includes, for example, a permanent magnet. The third drive assembly 41 and the fourth drive assembly 42 may constitute, for example Fig.14 The structure of the sonic motor shown in FIG. 1 may also be Fig.15 The structure of the servo motor shown is not limited in this embodiment.

[0072] In some embodiments, the first permanent magnet 3111 in the permanent magnet assembly of the first driving device 30 is arranged around the motor shaft 20. Figure 3 and Figure 9a The first permanent magnet 3111 is set to a complete ring shape, so that when the motor shaft 20 rotates relative to the housing 10, a part of the permanent magnet assembly can be kept in the magnetic field generated by the electromagnet assembly, ensuring multi-directional movement of the motor shaft 20.

[0073] The utility model also provides an electric care product 1000, comprising a housing 80, a working part 90 and any one of the above-mentioned motors 100, wherein the motor 100 is disposed in the housing 80, and the second section 202 of the motor shaft 20 can extend out of the housing 80 and be connected to the working part 90, or the second section 202 of the motor shaft 20 can also be in the housing 80 and be connected to the working part 90. The electric care product 1000 can be, for example, an electric toothbrush (see Fig.16a ), the working part 90 is the brush head of an electric toothbrush, and the electric care product 1000 can be, for example, a cleaning and care product such as a facial cleanser or a beauty instrument. The working part 90 is the cleaning head of a facial cleanser or a beauty instrument, and the electric care product 1000 can also be, for example, a fascia gun (refer to Fig.17a ) or adult products (refer to Fig.18a ) and other massage care products, the working part 90 is a fascia gun or a massage head of an adult product.

[0074] Fig.16bThe cross-sectional states of the motor shaft 20 at three different motion strokes when the electric care product 1000 is an electric toothbrush are shown. Fig.17b The cross-sectional states of the motor shaft 20 at three different movement strokes when the electric care product 1000 is a fascia gun are shown. Fig.18b The cross-sectional states of the motor shaft 20 at three different operating strokes when the electric care product 1000 is an adult product are shown. In the electric care product 1000, the distances moved by the working part 90 (brush head or massage head) relative to the housing 80 are different in different movement strokes of the motor shaft 20. Therefore, different stroke modes can be selected for different brushing areas of the electric toothbrush to obtain different cleaning strengths, ensuring the cleaning strength while ensuring the safety of use. For fascia guns and adult products, different stroke modes can be selected according to the massage strength (massage depth) required by the customer. Therefore, the electric care product including the motor 100 with adjustable operating stroke has multiple stroke modes, which can adapt to the needs of different users.

[0075] In some embodiments, reference Fig.19 , the electric care product 1000 also includes a controller 50 and an operation button 60. The controller 50 is electrically connected to the electromagnet assembly in the motor 100. The controller 50 is, for example, a circuit board arranged in the housing 80, and is used to control the electromagnet assembly to generate a magnetic field. The operation button 60 is electrically connected to the controller 50. The operation button 60 is, for example, arranged on a circuit board and electrically connected to the circuit board. The operation button 60 is used to output a stroke adjustment signal to the controller 50 according to the content of the operation when operated by the user. The controller 50 controls the magnetic field change of the electromagnet assembly according to the stroke adjustment signal to achieve the stroke adjustment of the motor shaft 20. The way the magnetic field changes in the electromagnet assembly can refer to the principle description of the stroke adjustment in the aforementioned embodiment. In this embodiment, the controller 50 can be controlled differently by switching the operation button 60 between long press / short press or changing the number of presses.

[0076] Alternatively, in some embodiments, reference Fig. 20, the electric care product 1000 includes a controller 50 and a wireless transceiver component 70. The controller 50 is, for example, a circuit board arranged in the housing 80, and the wireless transceiver component 70 can be, for example, a Bluetooth transmission module, a WIFI transmission module, etc. arranged on the circuit board, so that the user can wirelessly connect to the wireless transceiver component 70 through external devices such as mobile phones, tablet computers, and laptop computers, and select a mode through an APP, a small program, etc. on the external device, and the wireless transceiver component 70 receives the wireless signal sent by the external device and outputs a stroke adjustment signal to the controller 50, and the controller 50 controls the magnetic field change of the electromagnet component according to the stroke adjustment signal to achieve the stroke adjustment of the motor shaft 20. Of course, the electric care product 1000 can be equipped with both the wireless transceiver component 70 and the operation button 60, so that the user can switch the stroke mode through two operation methods.

[0077] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A motor (100) with adjustable motion stroke, characterized in that: include: Housing (10); A motor shaft (20) movably connected to the housing (10); A first driving device (30) is arranged in the housing (10), the first driving device (30) is connected to the motor shaft (20) to drive the motor shaft (20) to move, and the first driving device (30) has at least three positioning positions, so that the motor shaft (20) has at least two movement strokes along a first direction.

2. The motor (100) with adjustable motion stroke according to claim 1, characterized in that: The first driving device (30) comprises: A first driving assembly (31) is arranged on the motor shaft (20); The second driving component (32) cooperates with the first driving component (31), and the second driving component (32) and the first driving component (31) have at least three positioning positions between them.

3. The motor (100) with adjustable motion stroke as claimed in claim 2, characterized in that: The first driving component (31) comprises a first magnet component (311), and the second driving component (32) comprises a second magnet component (321), and the second magnet component (321) is magnetically coupled with the first magnet component (311).

4. The motor (100) with adjustable motion stroke as claimed in claim 3, characterized in that: One of the first magnet assembly (311) and the second magnet assembly (321) is a permanent magnet assembly, and the other is an electromagnet assembly.

5. The motor (100) with adjustable motion stroke according to claim 4, characterized in that: The permanent magnet assembly comprises at least three first permanent magnets (3111), and the at least three first permanent magnets (3111) are arranged along the first direction. The at least three first permanent magnets (3111) are respectively magnetically attracted to the electromagnet assembly for positioning, thereby forming the at least three positioning positions.

6. The motor (100) with adjustable motion stroke according to claim 5, characterized in that: The magnetic poles of two adjacent first permanent magnets (3111) facing the same surface of the electromagnet assembly are opposite; or, the magnetic poles of the end surface between two adjacent first permanent magnets (3111) are opposite.

7. The motor (100) with adjustable motion stroke according to claim 3, characterized in that: The second magnet assembly (321) comprises at least three first electromagnets (3211), and the at least three first electromagnets (3211) are arranged along the first direction, and each first electromagnet (3211) comprises a first iron core (32111) and a first coil (32112) wound around the first iron core (32111), and the first coils (32112) of the at least three first electromagnets (3211) are respectively magnetically attracted to the first magnet assembly (311) for positioning, thereby forming the at least three positioning positions.

8. The motor (100) with adjustable motion stroke according to claim 2, characterized in that: The motor shaft (20) comprises a first section (201) and a second section (202), the first section (201) being located in the housing (10), the first drive assembly (31) being arranged on the first section (201), an end of the second section (202) away from the first section (201) extending from the housing (10), and the second section (202) and the first section (201) being assembled and connected or integrally connected.

9. The motor (100) with adjustable motion stroke according to any one of claims 1 to 8, characterized in that: The first direction is the axial direction or the circumferential direction of the motor shaft (20).

10. The motor (100) with adjustable motion stroke according to claim 1, characterized in that: The motor (100) further comprises a second driving device (40), the second driving device (40) being connected to the motor shaft (20), and the second driving device (40) being used to drive the motor shaft (20) to move along a second direction, wherein one of the second direction and the first direction is the axial direction of the motor shaft (20), and the other is the circumferential direction of the motor shaft (20).

11. An electric care product (1000), characterized in that: It comprises a housing (80), a working part (90), and a motor (100) according to any one of claims 1 to 10, wherein the motor (100) is arranged in the housing (80), and the motor shaft (20) is connected to the working part (90).

12. The electric care product (1000) according to claim 11, characterized in that: The electric care product (1000) is any one of an electric toothbrush, a fascia gun, a facial cleanser, a beauty instrument and an adult product.

13. The electric care product (1000) according to claim 11, characterized in that: The electric care product (1000) further comprises: A controller (50) electrically connected to the motor (100); an operating button (60), electrically connected to the controller (50); and / or, A wireless transceiver component (70) is electrically connected to the controller (50).

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